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Add timeout parameter to nfc_emulate_target() function.

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Fixes issue 219.

Thanks to raidolinja.
This commit is contained in:
Romuald Conty
2013-01-30 00:10:24 +01:00
parent b675db73be
commit cd2b03a08a
6 changed files with 34 additions and 10 deletions
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25
libnfc/nfc-emulation.c
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@@ -19,23 +19,33 @@
*/
/**
* @file nfc-emulation.c
* @brief Provide a small API to ease emulation in libnfc
*/
* @file nfc-emulation.c
* @brief Provide a small API to ease emulation in libnfc
*/
#include <nfc/nfc.h>
#include <nfc/nfc-emulation.h>
#include "iso7816.h"
/** @ingroup emulation
* @brief Emulate a target
* @return Returns 0 on success, otherwise returns libnfc's error code (negative value).
*
* @param pnd \a nfc_device struct pointer that represents currently used device
* @param emulator \nfc_emulator struct point that handles input/output functions
*
* If timeout equals to 0, the function blocks indefinitely (until an error is raised or function is completed)
* If timeout equals to -1, the default timeout will be used
*/
int
nfc_emulate_target(nfc_device *pnd, struct nfc_emulator *emulator)
nfc_emulate_target(nfc_device *pnd, struct nfc_emulator *emulator, const int timeout)
{
uint8_t abtRx[ISO7816_SHORT_R_APDU_MAX_LEN];
uint8_t abtTx[ISO7816_SHORT_C_APDU_MAX_LEN];
int res;
if ((res = nfc_target_init(pnd, emulator->target, abtRx, sizeof(abtRx), 0)) < 0) {
if ((res = nfc_target_init(pnd, emulator->target, abtRx, sizeof(abtRx), timeout)) < 0) {
return res;
}
@@ -44,12 +54,12 @@ nfc_emulate_target(nfc_device *pnd, struct nfc_emulator *emulator)
while (io_res >= 0) {
io_res = emulator->state_machine->io(emulator, abtRx, szRx, abtTx, sizeof(abtTx));
if (io_res > 0) {
if ((res = nfc_target_send_bytes(pnd, abtTx, io_res, 0)) < 0) {
if ((res = nfc_target_send_bytes(pnd, abtTx, io_res, timeout)) < 0) {
return res;
}
}
if (io_res >= 0) {
if ((res = nfc_target_receive_bytes(pnd, abtRx, sizeof(abtRx), 0)) < 0) {
if ((res = nfc_target_receive_bytes(pnd, abtRx, sizeof(abtRx), timeout)) < 0) {
return res;
}
szRx = res;
@@ -57,3 +67,4 @@ nfc_emulate_target(nfc_device *pnd, struct nfc_emulator *emulator)
}
return (io_res < 0) ? io_res : 0;
}